Diabolical Masquerade is a solo project of Katatonia guitarist Anders "Blakkheim" Nyström who started the idea to create a Horror Metal band where he could compose more extreme music while Katatonia was more focused on making emotional music. The music is very hard to categorize but it could be seen as some kind of avant-garde black metal. Dan Swanö has also appeared on the band as additional member. Their latest album "Death's Design" is an original motion picture soundtrack for the movie Death's Design. In early September 2004 it was announced that Blackheim had put the project to sleep after not having found the necessary inspiration while working on a fifth album.